/Engine/Source/Editor/Kismet/Public/BlueprintEditor.h
Move every node from the source graph to the destination graph. Add Each node that is moved to the OutExpandedNodes set. If the source graph is a function graph, keep track of the entry and result nodes in the given Out Parameters.
static void MoveNodesToGraph ( [TArray](API\Runtime\Core\Containers\TArray)< [UEdGraphNode](API\Runtime\Engine\EdGraph\UEdGraphNode) * > & SourceNodes, [UEdGraph](API\Runtime\Engine\EdGraph\UEdGraph) * DestinationGraph, [TSet](API\Runtime\Core\Containers\TSet)< [UEdGraphNode](API\Runtime\Engine\EdGraph\UEdGraphNode) * > & OutExpandedNodes, [UEdGraphNode](API\Runtime\Engine\EdGraph\UEdGraphNode) ** OutEntry, [UEdGraphNode](API\Runtime\Engine\EdGraph\UEdGraphNode) ** OutResult, const bool bIsCollapsedGraph )